Sometimes the error is purely digital. If your K-Suite version doesn't match the firmware version of your KESS hardware, protocols may appear greyed out or "not found".
If software fixes don't work, the problem might be physical. Low-quality clone boards often suffer from poor soldering or cheap components. Fix "Protocol not found" error on KESS V2 kess v2 protocol not found
If you own an original KESS V2 from Alientech, skip this section. If you own a $150 clone from eBay or AliExpress, read carefully. Sometimes the error is purely digital
corrupted or missing file structure on the device's internal microSD card (TF card) kess v2 protocol not found
Before you blame the software, check your physical setup. KESS V2 is notoriously sensitive to voltage instability.